from datetime import datetime, timedelta
import time
from flask import render_template, request, current_app, session, g, url_for, redirect, jsonify
from Program import user_login_data, constants, db
from Program.models import User, News, Category
from Program.modules.admin import admin_blu
from Program.utils.pic_storage import pic_storage
from Program.utils.response_code import RET


# 管理员登录页面
@admin_blu.route('/login', methods=['POST', "GET"])
@user_login_data
def admin_login():
    if request.method == "GET":
        user_id = session.get('user_id', '')
        is_admin = session.get('is_admin', False)
        user = g.user

        context = {
            "user": user.to_dict()
        }

        if user_id and is_admin:
            return render_template('admin/index.html', context=context)

        return render_template('admin/login.html')
    # 获取参数
    username = request.form.get("username")
    password = request.form.get("password")
    if not all([username, password]):
        return render_template('admin/login.html', errmsg="参数不足")

    try:
        user = User.query.filter(User.mobile == username).first()
    except Exception as e:
        current_app.logger.error(e)
        return render_template('admin/login.html', errmsg="数据查询失败")
    if not user:
        return render_template('admin/login.html', errmsg="用户不存在")

    if not user.check_passowrd(password):
        return render_template('admin/login.html', errmsg="密码错误")

    if not user.is_admin:
        return render_template('admin/login.html', errmsg="用户权限错误")

    session["user_id"] = user.id
    session["nick_name"] = user.nick_name
    session["mobile"] = user.mobile
    session["is_admin"] = True

    # 跳转到后台管理主页
    return redirect(url_for('admin.admin_index'))


# 后台管理首页
@admin_blu.route("/index", methods=['POST', "GET"])
@user_login_data
def admin_index():
    # 读取登录用户的信息
    user = g.user
    # 优化进入主页逻辑：如果管理员进入主页，必须要登录状态，反之，就引导到登录界面
    if not user:
        return redirect(url_for('admin.admin_login'))

    # 构造渲染数据
    context = {
        'user': user.to_dict()
    }
    print(context)
    # 渲染主页
    return render_template('admin/index.html', context=context)


# 用户统计
@admin_blu.route("/user_count")
@user_login_data
def user_count():
    """用户统计视图"""
    total_count = 0  # 查询总人数
    try:
        total_count = User.query.filter(User.is_admin == False).count()
    except Exception as e:
        current_app.logger.error(e)

    # 查询月新增人数
    mon_count = 0
    try:
        now = time.localtime()
        mon_begin = '%d-%02d-01' % (now.tm_year, now.tm_mon)  # 获取本月开始时间字符串“2018-10-10”
        mon_begin_date = datetime.strptime(mon_begin, "%Y-%m-%d")  # 把一个时间字符串转化成时间元组（2018-10-10）
        mon_count = User.query.filter(User.is_admin == False, User.create_time >= mon_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 查询日新增人数：
    day_count = 0
    try:
        day_begin = '%d-%02d-%02d' % (now.tm_year, now.tm_mon, now.tm_mday)
        day_begin_date = datetime.strptime(day_begin, '%Y-%m-%d')
        day_count = User.query.filter(User.is_admin == False, User.create_time > day_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)

    """生成图表信息"""
    # 获取到当天00:00:00时间
    now_date = datetime.strptime(datetime.now().strftime('%Y-%m-%d'), '%Y-%m-%d')

    # 定义空数组，保存数据
    active_date = []
    active_count = []

    # 依次添加数据，再反转
    for i in range(0, 31):  # 0~30
        """
        now_date: 2018-10-11:00:00 减去0天
        begin_date：2018-10-11:00:00  开始时间
        end_date: 2018-10-11:23:59    结束时间 = 开始时间 + 1天


        now_date: 2018-10-11:00:00 减去1天
        begin_date：2018-10-10:00:00  开始时间
        end_date: 2018-10-10:23:59    结束时间 = 开始时间 + 1天


        now_date: 2018-10-11:00:00 减去2天
        begin_date：2018-10-09:00:00  开始时间
        end_date: 2018-10-09:23:59    结束时间 = 开始时间 + 1天
        .
        .
        .
        now_date: 2018-10-11:00:00 减去30天
        begin_date：2018-09-11:00:00  开始时间
        end_date: 2018-09-11:23:59    结束时间 = 开始时间 + 1天

        """
        # 一天的开始时间
        begin_date = now_date - timedelta(days=i)  # timedelta代表两个datetime之间的时间差
        # 一天的结束时间
        # end_date = now_date - timedelta(days=(i - 1))
        end_date = begin_date + timedelta(days=1)
        active_date.append(begin_date.strftime('%Y-%m-%d'))
        count = 0
        try:
            count = User.query.filter(User.is_admin == False, User.last_login >= begin_date,
                                      User.last_login < end_date).count()
        except Exception as e:
            current_app.logger.error(e)
        active_count.append(count)

    # 数组反转
    active_date.reverse()
    active_count.reverse()

    # 组织返回数据
    data = {"total_count": total_count, "mon_count": mon_count, "day_count": day_count, "active_date": active_date,
            "active_count": active_count}

    return render_template('admin/user_count.html', data=data)


# 用户列表
@admin_blu.route('/user_list')
def user_list():
    """获取用户列表"""

    # 获取参数
    page = request.args.get("p", 1)
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    # 设置变量默认值
    users = []
    current_page = 1
    total_page = 1

    # 查询数据
    try:
        paginate = User.query.filter(User.is_admin == False).order_by(User.last_login.desc()).paginate(page,
                                                                                                       constants.ADMIN_USER_PAGE_MAX_COUNT,
                                                                                                       False)
        users = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    # 将模型列表转成字典列表
    users_list = []
    for user in users:
        users_list.append(user.to_admin_dict())

    context = {"total_page": total_page, "current_page": current_page, "users": users_list}
    return render_template('admin/user_list.html',
                           data=context)


# 新闻审核
@admin_blu.route('/news_review')
def news_review():
    """返回待审核新闻列表"""

    page = request.args.get("p", 1)
    keywords = request.args.get("keywords", "")
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    try:
        filters = [News.status != 0]
        # 如果有关键词
        if keywords:
            # 添加关键词的检索选项
            filters.append(News.title.contains(keywords))
        # 查询
        paginate = News.query.filter(*filters) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages

    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_review_dict())

    context = {"total_page": total_page, "current_page": current_page, "news_list": news_dict_list}

    return render_template('admin/news_review.html', data=context)


# 新闻审核详情
@admin_blu.route("/news_review_detail", methods =["POST", "GET"])
def news_review_detail():
    """新闻审核"""
    if request.method == "GET":
        # 获取新闻id
        news_id = request.args.get("news_id")
        if not news_id:
            return render_template("admin/news_review_detail.html", date={"errmsg": "未查询到此新闻"})
        # 通过id查询新闻
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template("admin/news_review_detail.html", date={"errmsg": "未查询到此新闻"})
        # 返回数据
        data = {"news": news.to_dict()}
        return render_template("admin/news_review_detail.html", data=data)

    # 执行审核操作

    # 1.获取参数
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    # 2.检验参数
    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    if action not in ["accept", "reject"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    news = None
    # 3.查询新闻
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到数据")

    # 4.根据不同的状态设置不同的值

    if action == "accept":
        news.status = 0
    else:
        # 拒绝通过，需要获取原因
        reason = request.json.get("reason")
        if not reason:
            return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
        news.reason = reason
        news.status = -1

    # 5.保存数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="数据保存失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")


# 新闻版式编辑
@admin_blu.route('/news_edit')
def news_edit():
    """返回新闻列表"""

    page = request.args.get("p", 1)
    keywords = request.args.get("keywords", "")
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    try:
        filters = []
        # 如果有关键词
        if keywords:
            # 添加关键词的检索选项
            filters.append(News.title.contains(keywords))

        # 查询
        paginate = News.query.filter(*filters) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_basic_dict())

    context = {"total_page": total_page, "current_page": current_page, "news_list": news_dict_list}

    return render_template('admin/news_edit.html', data=context)


# 新闻版式编辑详情
@admin_blu.route('/news_edit_detail',methods = ['POST','GET'])
def news_edit_detail():
    """新闻编辑详情"""
    if request.method == "GET":
        # 获取参数
        news_id = request.args.get("news_id")

        if not news_id:
            return render_template('admin/news_edit_detail.html', data={'errmsg': "未查询到此新闻"})
        # 查询新闻：
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_edit_detail.html', data={'errmsg': "未查询到次新闻"})

        # 查询新闻分类数据
        categories = Category.query.all()
        categories_li = []
        for category in categories:
            c_dict = category.to_dict()
            c_dict['is_selected'] = False
            if category.id == news.category_id:
                c_dict['is_selected'] = True
            categories_li.append(c_dict)
        # 移除最新分类：
        categories_li.pop(0)

        data = {"news": news.to_dict(), "categories": categories_li}
        return render_template("admin/news_edit_detail.html", data=data)

    news_id = request.form.get("news_id")
    title = request.form.get("title")
    digest = request.form.get("digest")
    content = request.form.get("content")
    index_image = request.files.get("index_image")
    category_id = request.form.get("category_id")
    # 1.1 判断数据是否有值
    if not all([title, digest, content, category_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")
    news = None
    # 查询新闻对象
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 1.2 尝试读取图片
    if index_image:
        try:
            index_image = index_image.read()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

        # 2. 将标题图片上传到七牛
        try:
            key = pic_storage(index_image)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.THIRDERR, errmsg="上传图片错误")
        news.index_image_url = constants.QINIU_DOMIN_PREFIX + key

    # 3. 设置相关数据
    news.title = title
    news.digest = digest
    news.content = content
    news.category_id = category_id

    # 4. 保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    # 5. 返回结果
    return jsonify(errno=RET.OK, errmsg="编辑成功")


# 新闻分类管理页面
@admin_blu.route("/news_category")
def get_news_category():
    # 获取所有分类数据
    categories = Category.query.all()
    # 定义列表保存分类数据
    categories_dicts = []

    for category in categories:
        # 获取字典
        cate_dict = category.to_dict()
        # 拼接内容
        categories_dicts.append(cate_dict)

    categories_dicts.pop(0)
    # 返回内容
    return render_template('admin/news_type.html', data={"categories": categories_dicts})


# 修改或添加分类
@admin_blu.route('/add_category', methods=["POST"])
def add_category():
    """修改或者添加分类"""
    category_id = request.json.get("id")
    category_name = request.json.get("name")
    if not category_name:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 判断分类是否存在
    if category_id:
        try:
            category = Category.query.get(category_id)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

        if not category:
            return jsonify(errno=RET.NODATA, errmsg="未查询到分类信息")
        # 分类存在，修改分类对象
        category.name = category_name

    else:
        # 如果没有分类id，则添加分类
        category = Category()
        category.name = category_name
        db.session.add(category)

    # 将修改保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    return jsonify(errno=RET.OK, errmsg="保存数据成功")
